Module: Soil Moisture Content
(c) 2002 by O.Conrad
Menu: Simulation > Hydrology
Description
The WEELS (Wind Erosion on European Light Soils) soil moisture model dynamically calculates the soil moisture based on the rules proposed by the DVWK (1996) with input data about:
- soil properties (grids: field capacity and permanent wilting point)
- land use (grid: crop types)
- climate (table: daily values of precipitation, temperature, air humidity)

References:
- DVWK - Deutscher Verband fuer Wasserwirtschaft und Kulturbau e.V. (1996): 'Ermittlung der Verdunstung von Land- und Wasserflaechen', DVWK Merkblaetter 238/1996, Bonn, 135p.
- Boehner, J., Schaefer, W., Conrad, O., Gross, J., Ringeler, A. (2001): 'The WEELS Model: methods, results and limits of wind erosion modelling', In: Catena, Special Issue

Parameters
NameTypeIdentifierDescriptionConstraints
Input
Field Capacity [mm] (*)Grid (optional input)STA_FC
Permanent Wilting Point [mm] (*)Grid (optional input)STA_PWP
Land Use (*)Grid (optional input)LANDUSE
Output
Soil MoistureGrid (output)DYN_W
Options
DefaultFloating pointSTA_FC_DEFMinimum: 0.000000
DefaultFloating pointSTA_PWP_DEFMinimum: 0.000000
DefaultIntegerLANDUSE_DEF
Climate DataStatic tableDYN_CLIMATE3 Fields:
- 1. [DOUBLE] Precipitation [mm]
- 2. [DOUBLE] Temperature (2pm) [DegreeC]
- 3. [DOUBLE] Air Humidity (2pm) [%%]
Crop CoefficientsStatic tableSTA_KC14 Fields:
- 1. [INTEGER] Land Use ID
- 2. [STRING] Name
- 3. [DOUBLE] January
- 4. [DOUBLE] February
- 5. [DOUBLE] March
- 6. [DOUBLE] April
- 7. [DOUBLE] May
- 8. [DOUBLE] June
- 9. [DOUBLE] July
- 10. [DOUBLE] August
- 11. [DOUBLE] September
- 12. [DOUBLE] October
- 13. [DOUBLE] November
- 14. [DOUBLE] December
(*) optional